Reactive Power Capability of Brushless Doubly Fed Induction Generators

doi:10.11985/2016.12.004

Abstract

Abstract:

Quantification of reactive power capability (RPC) is necessary for the brushless doubly-fed induction generator (BDFIG) participating in voltage control and security dispatch of power system. The analytical model of the RPC of the BDFIG with different wind speeds and operation modes is newly quantified. Following the maximum power point tracking (MPPT), derivatives of the upper/lower var limits to the slip are derived to validate effect of wind speeds on RPC. Following active power dispatch, the derivatives of var limits to the active output of the BDFIG are quantified to validate effect of power regulations on the RPC. The copper loss affects active output and var region, thus it is applied to quantify the error of the latter. Numerical results show that under MPPT mode, higher wind speed yields lower rotor slip and a wider RPC. Under active power dispatch with the same power references, the pitch angle regulation has lower copper loss and wider RPC compared with the rotor speed regulation.

Key words: Brushless doubly fed induction generator, reactive power capability, wind speed, slip, maximum power point tracking, active power dispatch

CLC Number:

TM614

Li Shenghu,An Rui,Wu Zhengyang. Reactive Power Capability of Brushless Doubly Fed Induction Generators[J]. Journal of Electrical Engineering, 2016, 11(12): 22-29.

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References 15

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v/(m/s)	s	P_wt(pu)	P_BDFIG(pu)	Q_BDFIGmin(pu)	Q_BDFIGmax(pu)
5.00	0.300 0	0.064 2	0.059 2	-1.395 7	0.873 6
6.00	0.266 6	0.123 8	0.117 5	-1.385 2	0.862 1
7.00	0.144 4	0.196 5	0.188 8	-1.376 0	0.851 5
8.00	0.022 2	0.293 3	0.283 4	-1.361 1	0.834 4
9.00	-0.100 1	0.417 7	0.404 5	-1.334 5	0.804 4
10.00	-0.222 3	0.572 9	0.555 2	-1.284 3	0.749 0
11.00	-0.300 0	0.758 5	0.733 6	-1.191 9	0.646 8
12.00	-0.300 0	0.928 8	0.894 3	-1.076 1	0.513 2
12.49	-0.300 0	1.000 0	0.960 9	-1.016 7	0.442 8

P_BDFIG,set(pu)	转速调节
P_BDFIG,set(pu)	s	P_BDFIG(pu)	Q_BDFIGmin(pu)	Q_BDFIGmax(pu)
0.25	0.238 5	0.238 8	-1.344 9	0.817 3
0.30	0.192 3	0.287 0	-1.333 1	0.803 7
0.35	0.145 5	0.335 3	-1.322 2	0.790 7
0.40	0.096 4	0.383 7	-1.312 8	0.779 6
0.45	0.042 6	0.432 2	-1.302 5	0.767 3
0.50	-0.021 0	0.481 2	-1.293 8	0.757 2
0.55	-0.110 8	0.530 8	-1.286 1	0.749 0
0.5729	-0.222 3	0.555 2	-1.284 3	0.749 0
P_BDFIG,set(pu)	桨距角调节
P_BDFIG,set(pu)	β/(°)	P_BDFIG(pu)	Q_BDFIGmin(pu)	Q_BDFIGmax(pu)
0.25	4.146 4	0.242 9	-1.378 6	0.854 7
0.30	3.234 8	0.291 8	-1.369 1	0.844 1
0.35	2.464 1	0.340 5	-1.357 7	0.831 4
0.40	1.796 4	0.388 9	-1.344 5	0.816 7
0.45	1.207 5	0.437 2	-1.329 5	0.799 9
0.50	0.680 7	0.485 3	-1.312 6	0.780 9
0.55	0.240 1	0.533 3	-1.293 7	0.759 6
0.5729	0	0.555 2	-1.284 3	0.749 0